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This fm wireless transmitter should only be used for educational purposes.
Regular transmission using such a transmitter without a licence is illegal.
I would like to tell you not to use this for illegal things
This transmitter can deliver signals up to 50 meters. The transistor 2N2222 serves as the modulator
as well as oscillator. Capacitor 33pf and inductor L1 forms the necessary tank circuit for making
oscillation. Adjustments in the transmission frequency can be made by compressing or relaxing
the coil. The voice to be transmitted is coupled to the base of Q1 using an electret microphone.
The FM signal available at the collector of Q1 is radiated using the antenna.
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Notes.
Use a 3V battery for powering the circuit.
The circuit can be assembled on a Vero board.
Coil L1 can be made by making 5 turns of 24AWG wire on a 1cm plastic former.
Antenna can be a 25cm long 18AWG wire.
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